NEUTRON-DIFFRACTION STUDY OF THE HEAVY FERMION SUPERCONDUCTORS UM2AL3 (M = PD, NI)

被引：200

作者：

KRIMMEL, A

FISCHER, P

ROESSLI, B

MALETTA, H

GEIBEL, C

SCHANK, C

GRAUEL, A

LOIDL, A

STEGLICH, F

机构：

[1] ETH ZURICH, LABOR NEUTRONENSTREUUNG, CH-5232 VILLIGEN, SWITZERLAND

[2] HAHN MEITNER INST KERNFORSCH BERLIN GMBH, W-1000 BERLIN, GERMANY

[3] TH DARMSTADT, INST FESTKORPERPHYS, W-6100 DARMSTADT, GERMANY

[4] UNIV MAINZ, INST PHYS, W-6500 MAINZ, GERMANY

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1992年 / 86卷 / 02期

关键词：

D O I：

10.1007/BF01313821

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

An elastic neutron scattering study was performed on the new superconducting heavy fermion systems UPd2Al3 and UNi2Al3. The neutron diffraction patterns reveal unambiguously long range antiferromagnetic order in UPd2Al3 with an ordered magnetic moment mu(U) = (0.85 +/- 0.03) mu(B), which coexists with the superconducting state. This is by far the largest mu(U) value observed for any heavy fermion superconductor. For UNi2Al3, no long-range magnetic order could be observed for temperatures T greater-than-or-equal-to 1.5 K, yielding an upper limit of the ordered moment of 0.2-mu(B).

引用

页码：161 / 162

页数：2

共 8 条

[1] MU+SR STUDIES OF UM2AL3, M = NI, PD [J].

AMATO, A ;

GEIBEL, C ;

GYGAX, FN ;

HEFFNER, RH ;

KNETSCH, E ;

MACLAUGHLIN, DE ;

SCHANK, C ;

SCHENCK, A ;

STEGLICH, F ;

WEBER, M .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1992, 86 (02) :159-160

[2] MAGNETIC EXCITATIONS AND ORDERING IN THE HEAVY-ELECTRON SUPERCONDUCTOR URU2SI2 [J].

BROHOLM, C ;

KJEMS, JK ;

BUYERS, WJL ;

MATTHEWS, P ;

PALSTRA, TTM ;

MENOVSKY, AA ;

MYDOSH, JA .

PHYSICAL REVIEW LETTERS, 1987, 58 (14) :1467-1470

[3] NEUTRON MAGNETIC FORM-FACTORS OF URANIUM IONS [J].

FREEMAN, AJ ;

DESCLAUX, JP ;

LANDER, GH ;

FABER, J .

PHYSICAL REVIEW B, 1976, 13 (03) :1168-1176

[4] A NEW HEAVY-FERMION SUPERCONDUCTOR - UNI2AL3 [J].

GEIBEL, C ;

THIES, S ;

KACZOROWSKI, D ;

MEHNER, A ;

GRAUEL, A ;

SEIDEL, B ;

AHLHEIM, U ;

HELFRICH, R ;

PETERSEN, K ;

BREDL, CD ;

STEGLICH, F .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1991, 83 (03) :305-306

[5] HEAVY-FERMION SUPERCONDUCTIVITY AT TC=2K IN THE ANTIFERROMAGNET UPD2AL3 [J].

GEIBEL, C ;

SCHANK, C ;

THIES, S ;

KITAZAWA, H ;

BREDL, CD ;

BOHM, A ;

RAU, M ;

GRAUEL, A ;

CASPARY, R ;

HELFRICH, R ;

AHLHEIM, U ;

WEBER, G ;

STEGLICH, F .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1991, 84 (01) :1-2

[6]

GEIBEL C, IN PRESS PHYSICA C

[7]

PARTHE E, 1984, HDB PHYSICS CHEM RAR, V6, P235

[8] A VERSATILE DOUBLE-AXIS MULTICOUNTER NEUTRON POWDER DIFFRACTOMETER [J].

SCHEFER, J ;

FISCHER, P ;

HEER, H ;

ISACSON, A ;

KOCH, M ;

THUT, R .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1990, 288 (2-3) :477-485

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